You can't think out a number to describe the twenty-five standard deviation event; it's just too large a number for any of us to comprehend.
你无法想出一个数字来描述25个标准差事件；这个数字太大了，我们任何人都无法理解。
The Six Sigma Black Belt should be able to compute the mean and standard deviation from a grouped frequency distribution.
六西格玛黑带应该能够计算出一个分组发生频次分布数据的均值和标准偏差。
What's the deal with standard deviation?
标准偏差又是怎么回事呢？
Especially if there is a small standard deviation.
特别是当标准偏差值很小的情况。
And you can calculate the standard deviation that way.
你可以用这种方法计算标准偏差。
So that's .16/100; so the standard deviation is .04.
那就是0.16/100,所以标准差等于0.04
If there's a large standard deviation it would be spread.
如果标准偏差值很大，那么它就比较分散。
The standard deviation is the square root of the variance.
标准差是方差的平方根。
How does the standard deviation quantify measurement scatter?
标准偏差如何量化度量值漂移？
From the measurements, compute the mean and standard deviation.
根据度量值计算出平均值和标准偏差。
Note: it may be impossible to measure the "true" standard deviation.
注意：不可能测量出“真实的”标准偏差。
The good news is the standard deviation, the red line, is trending downward.
好消息是，用红线表示的标准偏差呈现下降趋势。
According to my calculations it was a twenty-five standard deviation event.
根据我的估算,那次波动偏离均值有25倍标准差之巨
Overall response time was 1.4 seconds with a standard deviation under 2 seconds.
整体响应时间是1.4秒，并且标准偏差小于2秒。
A point estimate for the standard deviation of the execution time is 645.586 microseconds.
执行时间的标准偏差估值点是645.586微秒。
The mean adherence rate in the study population was 96.3% (standard deviation, SD: 7.7).
研究人群中的平均依从率为96.3％（标准差,SD：7.7）。
Then how different would the mean and standard deviation be if the procedure were repeated?
那么，如果重复执行度量过程，平均值和标准偏差会有多大变化？
So how do these outliers and dispersion affect the values of the mean and standard deviation?
那么这些异常值和分散度是怎么影响度量值和标准偏差的呢？
In fact, the warning at the end says that the standard deviation was not accurately measured.
实际上，末尾的警告指出标准偏差度量不精确。
So, how can the mean and standard deviation be used to determine which of two tasks is faster?
那么，如何用平均值和标准偏差判断两个任务中哪一个更快呢？
But if I would confine myself just to stocks and bonds, then I would get a much higher standard deviation.
但若组合里只有股票和债券，我的标准差会高得多。
It is the bell curve to which investors are referring when they talk about a "nine standard deviation event".
当投资者们谈及所谓“九个标准差事件”时，他们实际上在说钟形曲线。
You can use it to turn your variance measurement into a standard deviation measurement, as shown in Listing 8.
您可以利用此函数将您的样本方差计算转换为样本标准差计算，如清单8所示。
Actually calculating standard deviation can be a little challenging, but luckily many performance tools can help.
事实上，计算标准偏差可能有点麻烦，但幸运的是，许多性能工具可以帮助您完成这个任务。
Actually, a colleague and I recently discussed the importance of standard deviation and how it is often simply ignored.
事实上，最近我和一个同事讨论了关于标准偏差的重要性，以及它常常被人忽视的情况。
Normally distributed data assumes that about 68% of the values in the sample are within 1 standard deviation of the mean.
正态分布数据认为，样本中约68%的数值分布在距离平均值为1的标准偏差之内。
Using the average and the standard deviation, you can interpret that 68% of the attempts were between .2 and 1.3 seconds.
使用平均值和标准偏差，您可以说明，68%的尝试是在 0.2秒到 1.3 秒之间。
In Figure 11, the overall average response time dropped by slightly more then half, with the standard deviation well under 1 second.
在图11中，整体的平均响应时间下降了一半以上，并且标准偏差低于1秒。
You have seen the mean and standard deviation, and intuitively you might expect temperatures to be distributed normally. Let's check
您已经看到均值和标准偏差，直观上您可能会觉得温度是正态分布的。
This is important, because it shows that looking at just the average is not enough, especially if your standard deviation is a large number.
这是很重要的，因为它说明了，仅查看平均值是不够的，特别是当您的标准偏差非常大的时候。
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